A car tire must have more than 1.5mm of tread depth in the middle and 70 percent of its width. Running low tread depth will cause a loss of grip, especially in unfriendly conditions. So track your tread with LCD Digital Depth Gauge to keep you on theright track and for a smooth control of the steering wheel. It has an easy-to-read LCD screen, ergonomic styling for an easy hold, and a single press can measure your tire tread depth. Containing a tread and depth gauges, this is no doubt the bestway to keep an eye on your tires. Every car owner must have this LCD Digital Depth Gauge, Order it now No battery provided Power source: button battery quantity of delivery: 1 piece (Package contents: Only the above package contents, excluding other products.) size:112*60M (Reminder: The size is measured manually, please allow 1-2 cm measurement error) color: black color (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.) WUZHOU